4 Classes, 4 A's

Adam, Billy, Caroline, and David each have an A in their favorite subject. Each student has only one A and it is in either Calculus, Biology, Physics, or English. Each student's favorite class is taken during a different time from first to fourth period, and there is only one A per period. Match the student to their favorite class and the period in which the class is taken.

1) Adam's class is after Physics and before Biology.
2) Caroline has an A in Biology, so she tutors Billy during their free 4th period.
3) David is grounded for failing Physics 1st period.
4) The student with the A in English has the class 4th period.